[Paybeskf]

As Salam Aleykom
Allhamdullilah after i went 4 months tableegh , i did become a good muslim.
In 2 weeks iam gonna give nikah to a girl. My parent want me to give nikah, its just that the girls dont is a good muslim. She dont always pray & and dont wear niqab. I want a wife who wear clothes according to sunnah and a good practicing muslim . In secret i have find a a sister , who allhamdulilah is a verry good muslim . I want to marry her, but the problem is that my father have promise to married me to the girl father.
How should I tell my dad that I did not want her, but married to a practicing Muslim. I do not want my father to be angry.
I intend to marry her just to satisfy my dad.
What should I do?
Wasalam